from tkinter import *
x = int(input('введите x ='))
y = int(input('введите y ='))
n = int(input('введите n ='))
coords1 = [0*n+x,0*n+y,10*n+x,0*n+y,10*n+x,10*n+y,20*n+x,10*n+y,20*n+x,0*n+y,30*n+x,0*n+y,30*n+x,20*n+y,0*n+x,20*n+y,]
if n != 0 and max(coords1) <= 500 and min(coords1) >= 0:
    root=Tk()
    root.title('ИТ марафон')
    root.geometry ("500x500")
    canvas = Canvas (bg ='white', width=500, height=500)
    canvas.pack (anchor = CENTER, expand=1)
    canvas.create_polygon(coords1)
    root.mainloop()
else:
    print('Фигура выходит за скобки')
    exit()